On Fri, Apr 17, 2009 at 12:29 PM, Jarkko Nikula <jarkko.nikula@xxxxxxxxx> wrote: > On Thu, 16 Apr 2009 23:35:20 +0200 > ext Troy Kisky <troy.kisky@xxxxxxxxxxxxxxxxxxx> wrote: > >> Arun KS wrote: >> > But when I2S is used there is no audio on Right channel(left channel >> > is working fine). >> > Thinks something is missing on tlv320aic23 driver. >> > >> This sounds like the same problem Davinci has. From a comment in >> davinci-i2s.c >> >> case SND_SOC_DAIFMT_I2S: >> /* Davinci doesn't support TRUE I2S, but some codecs will have >> * the left and right channels contiguous. This allows >> * dsp_a mode to be used with an inverted normal frame clk. >> * If your codec is master and does not have contiguous >> * channels, then you will have sound on only one channel. >> * Try using a different mode, or codec as slave. >> * >> * The TLV320AIC33 is an example of a codec where this works. >> * It has a variable bit clock frequency allowing it to have >> * valid data on every bit clock. >> * >> * The TLV320AIC23 is an example of a codec where this does >> not >> * work. It has a fixed bit clock frequency with progressively >> * more empty bit clock slots between channels as the sample >> * rate is lowered. >> */ > > Interesting codec. Arun, how is the right channel working with I2S if > you try to run with higher rate? E.g. aplay -r [48000 | > 96000] /dev/urandom Its the same. Right channel remains blank and left channel is playing. > > The I2S mode setup in tlv320aic23_set_dai_fmt looks correct. > > > Jarkko > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
